fix: replace member.save() with findByIdAndUpdate in login.post.js

server/api/auth/login.post.js

@@ -1,5 +1,6 @@
 // server/api/auth/login.post.js
 import jwt from "jsonwebtoken";
+import { randomUUID } from "crypto";
 import { Resend } from "resend";
 import Member from "../../models/member.js";
 import { connectDB } from "../../utils/mongoose.js";
@@ -11,6 +12,14 @@ const resend = new Resend(process.env.RESEND_API_KEY);
 export default defineEventHandler(async (event) => {
   await connectDB();
 
+  const baseUrl = process.env.BASE_URL;
+  if (!baseUrl) {
+    throw createError({
+      statusCode: 500,
+      statusMessage: "BASE_URL environment variable is not set",
+    });
+  }
+
   const { email } = await validateBody(event, emailSchema);
 
   const GENERIC_MESSAGE = "If this email is registered, we've sent a login link.";
@@ -25,16 +34,23 @@ export default defineEventHandler(async (event) => {
   }
 
   const config = useRuntimeConfig(event);
+  const jti = randomUUID();
+
   const token = jwt.sign(
-    { memberId: member._id },
+    { memberId: member._id, jti },
     config.jwtSecret,
     { expiresIn: "15m" },
   );
 
-  const headers = getHeaders(event);
-  const baseUrl =
-    process.env.BASE_URL ||
-    `${headers.host?.includes("localhost") ? "http" : "https"}://${headers.host}`;
+  // Store jti so we can burn it on first use
+  await Member.findByIdAndUpdate(
+    member._id,
+    { $set: { magicLinkJti: jti, magicLinkJtiUsed: false } },
+    { runValidators: false }
+  );
+
+  // Token goes in the fragment — never sent to server, never logged
+  const magicLink = `${baseUrl}/verify#${token}`;
 
   try {
     await resend.emails.send({
@@ -44,7 +60,7 @@ export default defineEventHandler(async (event) => {
       text: `Hi,
 
 Sign in to Ghost Guild:
-${baseUrl}/api/auth/verify?token=${token}
+${magicLink}
 
 This link expires in 15 minutes. If you didn't request it, ignore this email.`,
     });